555 California Street, also known as the Bank of America Tower, is a 52-story modern skyscraper in San Francisco's Financial District. A prominent element of the San Francisco skyline and one of the most highly recognized towers on the West Coast, it belongs in the elite class of timeless trophy towers in American architecture. The three-building complex (which also includes 315 and 345 Montgomery Street) aggregates 1.8 million square feet.